hibiscus bloom with distinctive two colours

(Question)

How unusual is this hibiscus bloom? Has bloomed all summer on deck facing lake near Fort York and this opened today!

(Answer)

Dear Gardener, what a magnificent bloom. I have never seen one like it before.

One of our experts has told me that she thinks that the flower is an example of a “sport mutation”. A sport mutation is a genetic mutation which causes a sudden change in the appearance of the plant. This can show up as coloured flecks in a white flower.

The way to reproduce such a sport is through cuttings, and not through sexual propagation. There are a number of YouTube instructional videos that you can watch to find out how to do this. The following Toronto Master Gardener Gardening Guide also offers some fundamental guidance:
I hope you take on this little project. Cuttings from your sport bi-colour hibiscus would be a wonderful way to create an original present for your friends and family.
Happy gardening!